Subtract 3xy + 5yz- 7zx from 5xy - 2yz -2zx + 10xyz

Why what number should 5 to the power -1 so that the product may equal to - 7 to the power minus 1 answer with process 

A farmer planted some mango trees in a grid. If he adds 5 more rows with 4 trees in each, the total number of trees increases by 25%. Find the original number of trees in the orchard. (Hint: Set up a linear equation)

Find the square root of 60.84 by using with division method 

How many square numbers are there between 1000 and 1500

Class 8 maths chapter 1 exercise 1.4 ka question answer